What is the missing word in the following code?

Three out of five seniors remain undecided about a college major at the end of their senior year.

John recently worked on a project about various programming languages. he learned that though procedural language programs are useful, they have disadvantages too. what is a disadvantage of programs written in procedural languages? a. programs do not represent data complexity. b. programs take more time to execute. c. programs are prone to security threats. d. programs do not interface with multiple platforms.

Which of the following characters is acceptable to use in a filename? ? / – %