Which sentence is written correctly?

a) although the lasagna looked terrible, it tasted wonderful

b) ever since i was a teenager, i have loved going to the theater

c) pepper and i decided it was time to head home

d) while jonathan was napping, i finished doing the dishes

A.)
i believe, it seems to make the most sense.

A. although the lasagna looked terrible, it tasted wonderful. 
Incorrect because the "a" of although must be capitalized

B. Pepper and i decided it was time to head home. 
Incorrect because "i" must be capitalized

C.while Jonathan was napping, I finished doing the dishes. 
Incorrect because the "w" of while must be capitalized

D. Ever since I was a teenager, I have loved going to the theater.
CORRECT all letters needing capitalization have been capitalized.