I got these two questions incorrect. can explain the correct to is the one that chose

In a steady-state system (i.e. systems found in a cell), given: A + B C + D Which of the statements are true? (Select all that apply). If B depletes, the system attempts to restore B. The conversion is at equilibrium. If C depletes, A and B increase. If B depletes, C and D also deplete. The conversion is freely reversible. Examine this Pathway: A + B -->C D + E If the concentration of "C" increases what happens? (Select all that apply, assume no other connections to other pathways, assume cellular behavior.) D and E increase. A and B increase. The rate of the enzyme that makes C slows down. The rate of the enzyme that makes D and E speeds up. A and B decrease