Question

Choose the correct alternative:

Since around 1970, "with World population of 3.5 billion, they have doubled it" to our current level of over 7 billion in 2012.

(A) With a world's population of 3.5 billion, doubling it.
(B) With world's population of 3.5 billion, doubling it.
(C) When the world's population was 3.5 billion, it has doubled it.
(D) When the world's population was 3.5 billion, they have doubled it.​

Answer 1

A) With a world's population of 3.5 billion, doubling it.

(B) With world's population of 3.5 billion, doubling it.

(C) When the world's population was 3.5 billion, it has doubled it.

1. (D) When the world's population was 3.5 billion, they have doubled it.

Answer 2

Answer:

Answer choice (D)

• When the world's population was 3.5 billion, they have doubled it.

Explanation:

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