Which of the following best addresses the economic question for whom to produce?

a) compass learning group contracts a team from india to write a course.
b)head tome runs a social networking site with incorporated advertising.
c) lady zigzag's agent makes concert tickets available on a new smartphone app.
d) infocus conducts focus groups to determine its target market.

dna is made up of six smaller molecules -- a five carbon sugar called deoxyribose, a phosphate molecule and four different nitrogenous bases (adenine, thymine, cytosine and guanine).

the level of progesterone is low at the pre-ovulatory phase of the cycle but it gradually increases and the levels are high at the luteal phase. if pregnancy occurs, the level of progesterone will be high throughout the pregnancy.

if egg is fertilized and the mother gets pregnant, progesterone starts preparing the uterus for the implantation. it starts building up the lining of uterus and make it hostile of the period of pregnancy.