The answer is D. the availability of complementary goods
The Tigris and the Euphrates rivers have always been important to civilization. These two rivers cross through the ancient area of Mesopotamia, which is considered the "cradle of civilization."
However, nowadays, the rivers cross international boundaries. This has become an important problem for the region. The fact that the rivers cross boundaries means that it becomes difficult to establish who has the right to make use of the river. Moreover, this also means that it is difficult to decide who is responsible for damage or pollution to such rivers.
Because the both need opinions
Answer:
deflación es la bajada generalizada de los precios de los bienes y servicios de un país que se mantiene a lo largo de un período de tiempo. La bajada de precios tiene que ser generalizada, es decir, debe afectar la gran mayoría de los productos y servicios que integran el mercado.
