Saudi Arabia's economy is petroleum-based.
Oil accounts for 90% of the country's exports and nearly 75% of the government's revenues.
The trade of goods between the New World and Old World
The two islands are Cyprus and Malta
Answer: Well if you look at the questions all of these are plans so im not exactly sure but the most valid answer ould be ( B )
Astronauts in the future are planning to expllre mars because they think that it is possiable for humans to live on the planet mars.
Hope this helps in some way have a great rest of your day :)