The answer is (A. Afghanistan).
The Guayas River flows through Guyaquil, which is the largest city in
Ecuador. However, it is not the capital city, which is Quito. The Guayas
River has it's name, because it flows through the Guayas province. The
Guayas River does not flow into any ocean or sea. Guayaquil is also the
most populated in Ecuador. The city underwent relatively recently an
"urban renegation" to attract more tourists to that particular region of
Ecuador. This was also to help boost the economy, since at the moment
it mostly consists of small and medium businesses, agriculture and
aquaculture.
<span>Carbonic acid formation
CO2(g) + H2O(l) ----> H2CO3(aq)
Dissolving of calcite
CaCO3(s) + H2CO3(aq) ----> Ca(HCO3)2(aq</span>
