Question

Which choice contains a broad pronoun reference?

We need rain. This would clear the dust from the sky and end the drought.
We need rain to clear the dust from the sky and end the drought.
We need rain that would clear the dust from the sky and end the drought.
To clear dust from the sky and end the drought, we need rain.

Answer 1

We need rain that would clear the dust from the sky and end the drought.

NOT:
We need rain. This would clear the dust from the sky and end the drought.
We need rain to clear the dust from the sky and end the drought.
To clear dust from the sky and end the drought, we need rain.