Use the scenario to answer the question.
A weather forecast predicts that a sunny week will be followed by a rainy weekend.
Which pressure systems are likely to occur
Responses
A:first a low-pressure system, and then another low-pressure system
B:first a high-pressure system, and then a low-pressure system
C:first a low-pressure system, and then a high-pressure system
D:first a high-pressure system, and then another high-pressure system