Question

honesty is the best policy. that is known to all. into complex sentence​

Answer 1

Answer:

The best policy of honesty is known to all.

Explanation:

By rule of grammar.

Answer 2

"It is known to all, that honesty is the best policy".

Explanation :  

A sentence can be converted to a complex sentence by expanding a word or phrase into a subordinate clause. This clause can be a noun, adjective, or adverb clause.

A complex sentence is a sentence that has at least has one dependent clause and one independent clause and at least one. Complex sentences are easy to identify as they frequently use subordinating like because, since, or until to connect clauses.