A Taxpayer should have an accountant if they don't know the laws
This question has to do with the correct form of present simple tense for each person. Here, you should know that this form for every person looks the same, except for third person (he, she, it) where you have to add -s. Having this in mind, these are the correct answers:
1. Many Canadian citizens who live in Montreal speak French.
2. She speaks highly of the new president of the company.
3. Grace usually sleeps longer than her sister.
4. Newborn babies sleep for 16 to 17 hours a day.
5. Jorge suffers from chronic back pain.6. People with Alzheimer's disease suffer from memory loss.
A. A has both genders of the students and since we don’t know the amount of students of either gender, this serves as an indication that not all the students are of one gender or another.