Given a sentence with a missing word, pick the answer option that best fills out the missing word in the sentence. Indicate each answer with its index ('a', 'b', 'c', 'd').

Sound waves travel through the air in a similar manner, but in all ____ dimensions.\Question: Choose the right answer from options given a) three b) five c) nine d) one
a

Pelicans use ____ different ways to feed.\Question: Choose the right answer from options given a) no b) nine c) one d) two
d

Lightning can occur in ____ ways.\Question: Choose the right answer from options given a) eight b) five c) one d) four

d