Answer:
A
Explanation:
Laws. The system of rules, or statutes made by the government of a country, state, city. Statutes are enacted by legislative body, then signed by the ranking official (President/Governor). Everyone must follow them to be legal. Regulation is an abstract concept of management of complex systems according to a set of rules and trends. In systems theory, these types of rules exist in various fields of biology and society
Answer: 5(last one :regulation of circulatory system)

- How many months is 23 weeks?

Each month has at least 4 weeks, with some months having an extra day or two.
It's given to find how many months see there in 24 weeks. For this, we need to divide the given number of weeks (23) by the number of weeks in 1 month (4).
So,

We can see that 23 weeks is <u>5.75 months which is approximately 6 months. </u>
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If you want a more standard value then we can calculate weeks in 1 months as 4.345. Then, we must divide 23 weeks by 4.345.

Now, we'll get the answer as <u>5.293 months</u>.
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You can write the answer in either form. Your answer can be rounded of to 6 months in the 1st explanation or it can be written as 5 months if you followed the 2nd explanation. The given weeks is 23, an odd number..so it's hard to decide the correct number of months.
For this answer I would go with D. Retinalogic. It is not a vitamin.