A Marketing Cloud admin notices out of the last several sends, Send log data for a recent How could the admin ensure send data is recorded?

An entertainment company is hosting events across the country in different venues. They want to use Contact Builder to feed Journey Builder. Contact who enter a journey will go through a decision split based on the type of event. The journey will send a series of emails and one of them will contain the venue details dynamically populated with AMP script.
The Company collects the following information:
- Customer data (email address, first name, last name...).
- Event registration (email address, event ID, event name, event type, venue ID...).
- Venue details (venue ID, venue name, venue address...).
- Payment details (email address, event ID, total paid...).
The Company does not want to link everything in Contact Builder.
Which are the two data sources that must be incorporated inside Contact Builder?
Choose 2 answers.

Northern Trail Outfitters (NTO) only has enough licenses for their staff. A campaign manager is out on parental leave How should NTO create a new user to fill in?

Northern Trail Outfitters (NTO) is concerned about unauthorized API access to their Marketing Cloud account.
Which feature would NTO enable to assist in reducing threats from malicious API attacks?

Northern Trail Outfitters (NTO) is concerned about unauthorized API access to their Marketing Cloud account.
Which feature would NTO enable to assist in reducing threats from malicious API attacks?