Everyday responsibilities that can limit or restrict regular exercise include a. work schedule b. time spent commuting c. completing school work d. all of the above

All of the above is the correct answer.

Depending on your work schedule, there may be no time for you to get time in to exercise and then have enough time to sleep. So, a lot of people just choose to sleep.

Commuting is a big one, sometimes people can commute up to 2 hours a day just to get to work. That's a lot of time spent going to and from work and by the end of the day, there's no time or they are just too tired and they don't work out.

Completing school work can also be time consuming depending on how much you have to do and how hard you need to study. Some students would rather get the better grade and study than exercise.

D. all of the above

Explanation:

answer: proteins

explanation: complement is   system of circulate in the blood in a inactive form

i believe is what you're looking for?

d would be your answer