Both international and domestic travel markets are important for the economy of a country since the international travelers inject export income while domestic travelers recycle the domestic income of the national economy.

True

Explanation:

Export income is money that a company makes when it sells goods and services to other countries and its citizens. When international travellers spend on goods and services in a country therefore, they are increasing the export income of a country.

Domestic travellers are also important as they keep the flow of domestic funds going by recycling it when they go to another part of the country.

answer(b) revenue account which increases;