The active sentence is
→ C. Many people contributed to the invention of the telephone.
This sentence uses simple past tense
✐ formula past simple
(+) S + Verb 2 + O/C
(-) S + did + not + Verb 1 + O/C
(?) Did + S + Verb 1 + O/C?
_________________________
Subject : English
Keywords : Active Voice, Past simple
Also read the similar question brainly.com/question/9909961
This Guy came on a answer app to promote his business
The last one is your best bet
The author's prior knowledge with some opinions from others