Which method of the EntityCommand type should you use?

You are developing an ASP.NET MVC application. The application has a page that updates an image stored in
a database. Members of the EntityClient namespace are used to access an ADO.NET Entity Framework data
model. Images and associated metadata are stored in a single database table.
You need to run a single query that updates an image and associated metadata in the database while returning
only the number of affected rows.
Which method of the EntityCommand type should you use?

A.
ExecuteNonQuery()

B.
ExecutcScalar()

C.
ExecuteDbDataReader()

D.
ExecuteReader()