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

Material culture is the realm of ____ dimensional objects that make up our everyday environment.\Question: Choose the right answer from options given a) ten b) three c) six d) four
b

Stratospheric ozone is measured using ____ different instruments.\Question: Choose the right answer from options given a) two b) nine c) one d) seven

a