help
 

please i want some one to answer these question for me , very fast
(1) my uncle has a goog processing business ..................in making biscuits
a) specialist b ) specialising c) specially d) specialises
(2) It was Issac Newton who gave .......as to what makes objects fall to the ground
a) a theory b) an explanation c) a discovery
(3) Have you ever seen .......lightning floating around
a) a ball b) ball