which of the following would occur if the heart pumped more strongly with each beat?

increase in both systolic and diastolic pressure
increase in systolic but decrease in diastolic pressure
decrease in systolic but increase in diastolic pressure
decrease in both systolic and diastolic pressure

In case the heart pumped more strongly with each beat it would cause an increase in both systolic and diastolic pressure.

Explanation:

To understand this answer we need to analyze the context and the reaction. First of all the hearth pumping would increase the stream of blood and that would not only increase the amount of blood streamed but also the tension the veins and the artery would have. The result of that scenario would an increase in both because the strength inside and outside the heart would increase dramatically at each moment.