Russel D Bag_____________
C. Was
It says "my parents or my older sister". The last subject stated is "my older sister" which is singular. And the only choice that's singular is 'was'. So that should be the answer.
I used speculation to determine weather or not to restrict the man from eating pizza this late at night.
D. Yours.
generally when writing a letter you put:
Yours truly,
(your name here)
which means that yours would be capitalized