If a country's saving rate increases, then in the long run a. productivity and real GDP per person are both higher. b. productivity is higher but real GDP per person is not higher. c. real GDP per person is higher but productivity is not higher. d. neither productivity nor real GDP per person is higher.

A) productivity and real GDP per person are both higher.

Explanation:

In the long run, an increase in savings will increase total investment. If total investment increases, then the productive capacity (productivity) and the aggregate supply should also increase. An increase in investment is the best way to guarantee a sustainable increase in aggregate demand without increasing the inflation rate.

When productivity increases, the real GDP per capita also increases.

the correct answer would be b, when, queen, calder hall and london.

explanation:

we always capitalize words when a paragraph or sentence is starting, when an important name is used, when a place is being written, or simply when a noun is used, etc. so in this sentence, sentence is starting from 'when', so it will be written in capital letters. secondly, queen is considered to be an important person, so it will also be written in capital letter. next, the name of the town is mentioned, i-e calder hall, which will also be written in capital letters. in the last,   city name is being used, 'london', which will also be written in capital letters. so option b is the most appropriate one.

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