Answer:
Choice C, Simple.
Explanation:
(sentence: Aliza<u> found</u> fragments of ancient pottery)
There are three tenses in english. There's Past, present, and future.
These show something being at a certain point in time, like,
"I <em>was </em>eating that in <em>1987</em> but then you stole it and fed it to the dog"
However, these can't always be clear as to a very specific point in time, like,
"I <em>was</em> eating that, until you stole it and fed it to the dog."
So, it's a simple verb, because it shows an action, but it isn't pinpointing a specific moment in time.
