Which of the following sets of numbers could be the lengths of the sides of a triangle?
A. 7.4 cm, 10.5 cm, 15.5 cm
B. 10.5 cm, 15.5 cm, 4.5 cm
C. 7.4 cm, 15.5 cm, 23 cm
D. 7.4 cm, 10.5 cm, 19.5 cm