Which of these is an advantage of multicellular organisms?

a. one cells performs all of the necessary functions.

b. all of the cells are the same.

c. they can reproduce quickly.

d. they can form complex organ systems.

The sum of the first eight terms of an arithmetic progression is 9m + 14. the fifth term of the06 progression is 2m - 6, where m is a constant.given that the first term of the progression is 26,find the value of the common difference, d and thevalue of m.