The Culture of a Deep Puncture Wound in a Farmer's

The culture of a deep puncture wound in a farmer's leg grew pinpoint gray colonies on sheep blood and medium colonies on reducible blood agars. The Gram stain, from the sheep blood agar, is illustrated here.
Source: CDC and Don Stalons
Given these results, you should

A) perform a catalase test.
B) examine colonies from both environments for the presence of spores.
C) perform aerotolerance testing.
D) both a and b.