What type of micro sd card is needed for this type of MP3 player? I tried searching it up and a bunch came up. I don’t know which one is the right one. Someone please help me <3

Which of the following is a way the operating system prevents unknown or unauthorized users from accessing the system?

Two students are discussing electricity that has a frequency of 60 hz. student a says that this type of electricity is referred to as ac. student b says that in this type of electricity, the electrons flow in only one direction. which of the following statements is correct? a. only student a is correct b. only student b is correct c. both of the two students are correct d. neither of the two students is correct

While creating a web page, what does each of the following html tags define? 1. 2. 3. 4. a. defines a new paragraph b. defines a term c. defines a single line break d. defines a heading