Look at the image taken of the navigation elements that appear at the top of the Coursera website. Why might Coursera's designers decide to permanently place a search field in this area?A$.$ Coursera's outline of scope probably determined that Search an important functionality requirement.B$.$ Coursera probably thinks that learners like to use the search field as a way finding tool.C$.$ Coursera probably wants to imitate other search sites like Google.D$.$ Coursera is following a website design rule which dictates that every website should have a search field.a