Which operation is possible?

You are a Dynamics 365 Finance developer.

You have the following Extended Data Types (EDTs):

You plan to modify the EDT properties by using an extension.

You need to determine which operations can be performed.

Which operation is possible?
A . Create an extension for AccountBase and decrease the field size.
B. Create an extension for AccountId and increase the field size.
C. Create a derived EDT for AccountId and decrease the field size.
D. Create an extension for AccountBase and increase the field size.

Answer: D

Explanation:

You can only set the new String size to a value equal to or larger than the base EDT value.

Reference: https://docs.microsoft.com/en-us/dynamics365/fin-ops-core/dev-itpro/extensibility/modify-edt