Universal Container’s Salesforce admin is working with Salesforce developers on a new project. During the meeting, they were discussing the importance of force.com Metadata API. What do you think can this tool do?

Answer options:

A.Create, update, and delete standard objects and fields programmatically
B.Create, update, and delete custom objects and fields programmatically
C.Create and update standard objects
D.Create and update custom objects

Correct Answer: B 
Metadata API gives you the ability to create, update, and delete custom objects and fields programmatically. Metadata API can be accessed through force.com IDE or anti-migration tool. 
Option A is incorrect because the fields and objects should be custom not standard. 
Option C is incorrect because it should be custom objects 
Option D is incorrect because it can create, update, and delete not only create and update the custom objects 
Reference: 

https://developer.salesforce.com/docs/atlas.en-us.api_meta.meta/api_meta/meta_intro.htm