Given a short query with keyphrases about a research idea in 2008 in the domain of artificial intelligence, recommend the relevant datasets to validate the research idea from options provided. A short description of the datasets is also provided to help you.

Query: A face recognizer based on 2D-PCA.

Keyphrases: face recognition images

Dataset description:
HouseExpo: A large-scale indoor layout dataset containing 35,357 2D floor plans including 252,550 rooms in total.
DFW: Contains over 11000 images of 1000 identities with different types of disguise accessories. The dataset is collected from the Internet, resulting in unconstrained face images similar to real world settings.
FERG: FERG is a database of cartoon characters with annotated facial expressions containing 55,769 annotated face images of six characters. The images for each character are grouped into 7 types of cardinal expressions, viz.
ORL: The ORL Database of Faces contains 400 images from 40 distinct subjects. For some subjects, the images were taken at different times, varying the lighting, facial expressions (open / closed eyes, smiling / not smiling) and facial details (glasses / no glasses).

Options:- A: HouseExpo  B: DFW  C: FERG  D: ORL
ORL