While Crawling, Liam Sees a Small Pebble on the Kitchen

Multiple Choice

While crawling, Liam sees a small pebble on the kitchen floor. He uses the pincer grasp to pick up the pebble. As he still has not started walking, he crawls toward his mother. In the context of key milestones in the first 3 years of life, Liam is most likely

A) 5 months old.
B) 10 months old.
C) 12 months old.
D) 18 months old.