Which word could replace the underlined word wothout changing the overll meaning of the sentence

1)a

2 b

3 d

4 d or b

explanation:

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the boy's acceleration toward the girl is 2.08 m/s^2.

explanation:

according the newton's third law, the force causing the girl accelerate towards the boy will be me with equal counter-force causing the boy to accelerate towards the girl. these forces will be of equal magnitude and allows us to determine the boy's acceleration:

the boy's acceleration toward the girl is 2.08 m/s^2.

c) vampires in history and modern life.