The correct options are
B They had good facilities for water storage.
C The region was very fertile, thanks to the rivers Tungabhadra, Krishna, and Godavari.
D Wealthy landholders and temples gave money to improve conditions in irrigation.
Agriculture flourished in the Vijayanagara Empire because of various reasons. Some of them include:
a) The region was very fertile, thanks to the rivers Tungabhadra, Krishna, and Godavari.
b) They had good water storage facilities.
c) Wealthy landholders and temples gave money to improve conditions in irrigation.
Agriculture was not prioritised over other occupations.