The weather report states that there will be high humidity. Which weather conditions can be expected? (SIENCE)

C. naturally in the environment

Answergranulation;

The us is first  the  u.s. economy  remains the  largest in the world  in terms of nominal  gdp. however, the  u.s. economy  loses its spot as the number one  economy  to china when  measured  in terms of  gdp  based on ppp. in these terms, china's  gdp  is $23.19 trillion exceeds the  u.s. gdp  of $19.42 trillion

Ithink the answer is either a , c or d