3. A student examined a patch of mud and recorded several statements about the footprints in the mud
Which statement is most likely an inference? (Choose one answer only)
a. The footprints were made by a dinosaur.
b. The footprints are oriented in an east-west direction.
c. There are five footprints in the mud.
d. The depth of the deepest footprint is 3 centimeters.

Explain your reasoning:
bservations based on this image: