Challenge Ari, Beth, and Cathy each went for a walk yesterday afternoon. Ari walked 3/4 mi at a constant...

Challenge Ari, Beth, and Cathy each went for a walk yesterday afternoon. Ari walked 3/4 mi at a constant speed of 1/4 mi/h. Beth walked 1/2 mi at a constant speed of 1/8 mi/h. Cathy walked for 1 h and 21 min at a constant speed of 1/8 mi/h. List the three people in order of the times they spent walking from least time to greatest time.
Choose the correct answer below.
A. Cathy, Beth, Ari
B. Beth, Cathy, Ari
C. Ari, Beth, Cathy
D. Cathy, Ari, Beth