Instructions: answer question based on the following text
(Avaliable in: https://people.com/parents/vacations-better-than-toys-holiday-gifts-kids/ text specially adapted for this test.)
Mark the alternative that best completes the statement The dotted blank in line 16 should be completed with ___ because ___..
A) Is system is singular
B) Are these is used with plural
C) Are play system is a compound noun
D) Is these is used with singular
E) Is there are two types of systems