Universal Container’s Sales Ops admin wants to create a simple and quick report to look at all open opportunities in Salesforce. She is not interested in creating any groups of data. Which of the following report is best to meet her needs?

Answer options:

A.Tabular
B.Summary
C.Matrix
D.Tabular and Matrix grouped together

Correct Answer: A 
Tabular reports are considered the quickest and easiest way to look at the data in Salesforce.They look like a spreadsheet, but you can’t use them to create any groups of data. 
Option B is incorrect because in summary report you can create any group of data. It provides more option to organize the data. 
Option C is incorrect because the Matrix report gives you the ability to group records by column and row and they are considered time-consuming. 
Option D is incorrect because you can’t create tabular and Matrix grouped together 
Reference: 

https://help.salesforce.com/articleView?id=reports_changing_format.htm&type=5