[单选题]
A package of supplies is dropped fh1(4fmk bi(o 0wakug+rom a planw*qz(n 6g ctf0e, and one second later a second package is dropped. Neglecting air resistance, the distance between the falling packages wiw (zng f*t60cqll
A. be constant.
B. decrease.
C. increase.
D. depend on their weight.