Answer:
b. using a stool or a small ladder to reach the glass
Explanation:
The safest choice for Wilma to get a glass from a top shelf of a cabinet is using a stool or a small ladder to reach the glass as these are appropiate tools that would not move, that are at a good height for her to climb and will allow her to reach the glass easily. The other options are not safe because if she jumps to knock the glass into her hands she can fall or the glass can break and cut her. If she grabs a chair from the table and uses it to reach the glass, she can fall while trying to stand on it or it can move and if she tries to climb on the countertop, she can fall because of the height it has.
