Select the we command$(s$ in this sentence:

Let's make a reservation so we won't have to wait.

$$ Let's make $$ a $$ reservation $$ so $$ we $$ won't $$ have to $$ wait

Which of the following contains a verb in the pluperfect indicative?

a$.$ we have opened

b$.$ she had arrived

c$.$ it was broken

d$.a$ & $b$

e$.$ b & c