Hello sry to disturb but could somebody help im confused

Consider the folloeing website url: what does the "http: //" represent? a. protocal identifier. b. ftp. c. domain name d. resource name

Can someone work out the answer as it comes up in one of my computer science exams and i don't understand the cryptovariables

What questions about an audience should be asked during presentation preparation? check all that apply. what does the audience already know about the topic? how will multimedia tools inspire the audience? is the information interesting and engaging? how will this information affect the presentation? will the audience change the message’s purpose? what is likely to interest the audience?