plz help with geometry dialation question its very easy but can't think

Question

Which of the following scale factors is a reduction
A 1:3
B 0.5:0.75
C 3:2
D 1:1.0055

Answer 1

A dilation occurs when the size the of figure is increased.

 

A. The second figure is three times the first 1:3 - dilation

B. The second figure is one and a half time the first 0.5:0.75 - dilation

C. The second figure is two-thirds of the first 3:2 - not a dilation

D. The second figure is a multiple of the first 1:1.0055 - dilation