What do the following commands mean for each of them? a,b,c

What does this command mean? addl 16(%ebp),%ecx Select one a. Reg[ecx] 16 Mem[Reg[ebp]] b. Reg[ecx Reg[ecx] Mem[Reg[ebpl16 C. Mem[Reg[ebpl] Reglecx]+ Mem[Reg[ebp]16] d. Reg[ecx]-Reg[ecx] + Mem[Reg[ebp] + 16]