I believe the answer is: exports minus imports ; ALL
Gross domestic product is calculated to measure one country's productivity within one year. Imports are considered other country's productivity, so it need to be deducted from the exports.
Total output is used as a factor to calculate GDP. It measures all goods or services that created by legal citizens in the country.
The correct answer is the progesterone. This is one of the
hormones of a human’s body by which they are responsible for regulating and
stimulates the various functions of one’s body and that it helps in producing
the ovaries, placenta and helps prepare the body for pregnancy.
Answer: d. late spring
The annual flooding of the Nile is caused by a yearly monsoon between May and August. However, in ancient times Egyptians believed it to be the arrival of Hapi, god of the flooding of the Nile (though not of the Nile itself). Hapi symbolized fertility, as the flooding provided fertile soil in an otherwise dry environment.
The correct answer is variable interval schedule. It is
because this is considered to be a type of operant conditioning reinforcement
by which the reinforcement is likely to be given to the response after a
specific time has passed by which the time is likely unpredictable as it
changes or variable schedule.