Avoidance is a method of addressing conflict of interest by preventing it from occurring in the first place.
Ethical Financial's policies and procedures manual (PPM) require that Catarina decline the gift from Darlene, which is a potential source of conflict of interest. By doing so, Catarina avoids any appearance of favouritism or bias towards Darlene's mutual fund family. (Canadian Investment Funds Course, Chapter 2, Section 2.3)
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Canadian Investment Funds Course, Chapter 2, Section 2.3: Conflicts of Interest IFSE Institute: Conflicts of Interest1

Government of Canada Bonds are fixed income securities issued by the federal government that pay a fixed rate of interest (coupon) and return the principal amount (par value) at maturity. They are considered low risk investments, as they are backed by the full faith and credit of the government. They also provide regular income to investors, as they pay interest semi-annually. For Sheldon, who has a low risk profile and an investment objective of receiving regular income, 3% Government of Canada Bonds at par would be an appropriate investment recommendation, as they would match his time horizon of 5 years and provide him with a stable and predictable income stream. The other options are not suitable for Sheldon, as they involve higher risk, volatility, or complexity.
References = Canadian Investment Funds Course, Unit 5: Types of Investments, Lesson 2: Fixed Income Securities, Section 5.2.1: Government Bonds1; CIFC prepkit, Chapter 5: Types of Investments, Question
5.2.1 2

A mutual fund trust is a type of unit trust that meets certain conditions under the Canadian Income Tax Act and is eligible for favourable tax treatment. A unit trust is a collective investment vehicle that holds assets and distributes profits to individual unit owners, also called unitholders, instead of reinvesting them in the fund. A mutual fund trust is not a corporation and does not have a board of directors or shareholders. It is also not a closed-end fund, which has a fixed number of shares that trade on an exchange. A mutual fund trust is an open-end fund, which can issue and redeem units at any time based on the net asset value of the fund.
Canadian Investment Funds Course, Unit 5, Section 5.1

A pension adjustment (PA) is the amount that the Canada Revenue Agency (CRA) assigns to your pension plan each year to reflect the value of the pension benefits that you earned. The PA reduces your registered retirement savings plan (RRSP) contribution room for the following year by the same amount. The PA ensures that all taxpayers have access to comparable tax assistance, regardless of the type of pension plan they participate in. You will receive a PA whether you are in a defined contribution or a defined benefit pension plan, but the calculation of the PA will differ depending on the type of plan. (Canadian Investment Funds Course, Chapter 8, Section 8.2)
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Canadian Investment Funds Course, Chapter 8, Section 8.2: Retirement Savings Plans and Pension Plans Investopedia: Pension Adjustment: Definition and Types of Plans1 PlanEasy: What Is A Pension Adjustment?2

Cavalry can place a temporary hold on Darsha's account to temporarily disallow the redemption if they have reasonable grounds to believe that Darsha is being financially exploited or that she lacks mental capacity to make financial decisions. This is in accordance with the guidance issued by the Mutual Fund Dealers Association of Canada (MFDA) on how to deal with vulnerable clients. A temporary hold can be placed for up to 15 business days, which can be extended for another 15 business days if necessary. During this time, Cavalry must conduct an internal review of the matter and contact Darsha and any trusted contact person or legal representative to resolve the situation. Cavalry cannot place a permanent hold on Darsha's account without her consent or a court order. Cavalry is not required to place a temporary hold on Darsha's account, but it is an option available to them to protect their client's interests. References: What We Heard Report:
Financial Crimes and Harms Against Seniors, MFDA Bulletin #0859-P - Guidance on Vulnerable Clients