Marx focused on the relational class structure, made up of the capitalist class (the bourgeoisie) and the working class (the proletariat). However, managers could more accurately be described as occupying contradictory class locations because

a. they earn more than the proletariat, but less than the bourgeoisie.
b. they control the means of production, but they do not control others' labor.
c. they own the means of production, but also work with the proletariat.
d. they don't own the means of production, but they do control others' labor.

a.they earn more than the proletariat, but less than the bourgeoisie.

Explanation:

Proletariat refers to those people which belongs to lower class or which are poor, while bourgeoisie are those class of the society which are the richest people of the society. Between these two classes, some people belongs to middle class such as the manager because they have good financial condition as compared to lower class people but less wealthier than upper class of the society. They earn little as compared to bourgeoisie.

the menstrual cycle – higher tier. negative feedback mechanisms affect the production of hormones in the menstrual cycle. oestrogen also stimulates the release of lh (luteinising hormone) from the pituitary gland, which in turn controls the production of progesterone.