Which of the following statements describe(s)the properties of a purely segmented memory system?(73).
Ⅰ. It suffers from internal fragmentation
Ⅱ. It permits implementation of virtual memory
Ⅲ. It divides memory into units of equal size
A. Ⅰ only
B. Ⅲ only
C. Ⅱ only
D. Ⅰand Ⅲ