Question

What is the best way to change this sentence from active voice to passive voice?

You need to pack the supplies, the food, and the first aid kit before the camping trip.
A.
Someone needs to pack the supplies, the food, and the first aid kit before the camping trip.
B.
You probably should pack the supplies, the food, and the first aid kit before the camping trip.
C.
The supplies, the food, and the first aid kit all need to be packed before the camping trip.
D.
Before the camping trip, you need to pack the supplies, the food, and the first aid kit.

Answer 1

C. "The supplies, the food, and the first aid kit all need to be packed before the camping trip."
This uses a passive construction ("need to be packed") where the original objects become the subject.