The correct answer is B) existed before other cultures were present in the region.
<em>The Swahili coast developed its own unique culture that existed before other cultures were present in the region. </em>
The Swahili inhabited the African Great Lakes territories and spoke Swahili. They originated from Bantu people, from Kenya and Mozambique. By the 8th century, they traded their products through the Indian Ocean, receiving the influence of cultures such as the Chinese and Arab. It is true that the Swahili coast developed its own unique culture that existed before other cultures were present in the region.
If there was a road built to connect with a larger trade route, a southeastern African village would likely experience young members of the community adopting new nontraditional beliefs and opinions.
An electronic calendar would be an example of software. The remaining things which you've mentioned in your questions would be examples of peripheral devices (so mouse, scanner, and monitor :)).