What change is needed to this sentence?

My sister had twins at the beginning of January and decided to quit her job.

No change needs to be made to the sentence.

Explanation: The sentence shows a sequence of actions, one happening after the other, and as so it requires no pauses.

the most ethic and honorable thing for the newspaper to do are:

be completely transparent in reporting about the company’s attempt to trade favors.

contact other construction companies to tell them about the situation.

these two options are the most ethic because both promote the market fair course, by telling the other competitors about the company attempt to get ahead in the market by trading favors, the market is guaranteed equality and justice in the trading of goods and services.