Read the sentence. By 1887, there were 150,000 customers who had paid to have the customers’ homes connected by telephones.

Which is the best revision using pronouns?

By 1887, there were 150,000 customers who had paid to have their homes connected by it.

By 1887, there were 150,000 of them who had paid to have the customers’ homes connected by telephones.

By 1887, there were 150,000 customers who had paid to have their homes connected by telephones.

By 1887, there were 150,000 customers who had paid to have the customers’ homes connected by them.