Here are the correct pairs:
Influenza - Vaccination
The vaccination would make your body become unsuitable environmnet for the virus to live off, so you would not be infected. The vaccination would be re-developed every two years since virus can adapt to the old one.
HIV - education
We still have not found the vaccines to prevent HIV from infecting our body. The best method of prevention would be education. We need to teach the children that HIV can be spread through unsafe sex, needle sharing, or blood transfusion.
Kidney failure - organ donation
Every individuals have 2 kidneys and we can still live if we give one of them. Usually immediate families such as parents or siblings had a suitable match for the kidney donation.
The answer is obviously A
True because someone might make the wrong choice and not be under any drugs or influence

- 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.