Carl sent an e-mail to more than three thousand employees about a software update. the employees need to prepare for this update but he found that many people did not even read the e-mail. carl should create and send a newsletter send a business letter send another e-mail call each employee

The correct answer to the following question will be "Create and send a newsletter".

Explanation:

Newsletter: A newsletter is a paper or electronic publication that includes news about a company or an organization's activities that are circulated to its members, clients, employees or other subscribers.

The newsletter helps n sharing important information between employees, for example, new training procedures and providing relevant branch information and updates to help the workers excellently perform their duties.

Business letter: It is an official document that is usually sent to customers, staff, and stakeholders from one organization to another or from one corporation.

Call each employee: As 3000 employees are working in the organization(according to the question), so it is hard to call each employee and tell him about the update.

Send another e-mail: As some of the employees didn't even read the previous mail, so sending another mail is not an appropriate option.  

Hence, Carl should create and send the newsletter.