I believe the answer is 15-24.
Younger generation tend to have more tendency to be careless and conduct unsafe sexual interraction with one another.
Since it is very easy for HIV to be transmitted in sexual relationship without condom, the numbers would be particularly high from early teens to early adults
Explanation:
Treaty of Nanjing, (August 29, 1842) treaty that ended the first Opium War, the first of the unequal treaties between China and foreign imperialist powers. China paid the British an indemnity, ceded the territory of Hong Kong, and agreed to establish a “fair and reasonable” tariff. British merchants, who had previously been allowed to trade only at Guangzhou (Canton), were now permitted to trade at five “treaty ports” and with whomever they pleased (see Canton system). The treaty was supplemented in 1843 by the British Supplementary Treaty of the Bogue, which allowed British citizens to be tried in British courts and granted Britain any rights in China that China might grant to other countries
The correct answer to this question is letter "d. involvement." The involvement stage of a relationship is the stage when connections develop through self-disclosure and testing. Being involved will bring you to a higher step of intimacy. This will tell how you cope up with each other.
It’s should be the second choice or int this case b