What two sandbox types should the architect recommend for batch data testing?

Cloud Kicks (CK) is launching a new sneaker line during the upcoming holiday season and needs to do a thorough batch data testing before Go-Live. CK is using Salesforce unlimited edition.

What two sandbox types should the architect recommend for batch data testing? Choose 2 answers
A . Developer Pro sandbox
B. Partial Copy sandbox
C. Developer sandbox
D. Full sandbox

Answer: B,D