A mutual fund trust structure allows the fund to avoid taxation by distributing its income to unitholders. The feedback from the document states:
"The most common structure for mutual funds in Canada is the open-end trust. The trust structure allows a fund itself to avoid taxation. Any interest, dividends and capital gains income, net of the fund's fees, expenses and capital losses, if passed to its unitholders each calendar year, will allow the trust to avoid being taxed on its income." Reference: Chapter 10 - The Modern Mutual FundLearning Domain: The Modern Mutual Fund

According to the Canada Revenue Agency, taxable income is the amount used to calculate federal tax and provincial or territorial tax on the income tax return. Taxable income is calculated by subtracting tax deductions from total income. Total income is the sum of income from all sources, such as employment, business, investment, pension, and other income. Tax deductions are amounts that can be subtracted from total income to reduce the amount of income that is subject to tax. Some examples of tax deductions are RRSP contributions, child care expenses, moving expenses, and alimony payments. Tax credits are not subtracted from total income, but rather from the tax payable. Tax credits are amounts that can reduce the amount of tax owed or increase the amount of refund. Some examples of tax credits are basic personal amount, spouse or common-law partner amount, Canada workers benefit, and foreign tax credit.
Therefore, the correct answer is C. total income less tax deductions.
1: Line 26000 - Taxable income - Canada.ca 2

The management expense ratio (MER) is the percentage of a fund's assets that is paid to the fund manager for operating and managing the fund. A higher MER means that more of the fund's returns are eaten up by fees, leaving less for the investors. Therefore, Fontaine Equity Fund's higher MER of 2.99% contributes to its lower 5-year annualized return of 11.25%, compared to Chamberlain Equity Fund's MER of 2.57% and 5- year annualized return of 13.42%. Therefore, D is the correct answer. , Management Expense Ratio (MER):
Definition and How It Works - Investopedia

Endowment bias leads investors to overvalue assets they own compared to similar assets they do not own. The feedback from the document states:
"People who are subject to endowment bias place more value on an asset they hold property rights to than on an asset they do not hold property rights to." Reference: Chapter 5 - Behavioural FinanceLearning Domain: The Know Your Client Communication Process

The bond fund should be contributed to Natasha's RRSP from a tax efficiency perspective, because interest income from bonds is fully taxable at her marginal tax rate outside of an RRSP. By contributing the bond fund to her RRSP, Natasha can defer paying tax on the interest income until she withdraws it from her RRSP in retirement, when she may be in a lower tax bracket. The equity fund should be kept outside of her RRSP, because dividends and capital gains from equities receive preferential tax treatment compared to interest income. Dividends qualify for the dividend tax credit and capital gains are only 50% taxable. Furthermore, equities tend to have higher returns than bonds over the long term, which means that Natasha would have more after-tax income by keeping them outside of her RRSP. References: Registered Retirement Savings Plan (RRSP), Does it pay to invest in an RRSP? Here's the math