#1 is A and #2 is B, but I don't know about #3 and #4.
The area that holds all the instructions the computer needs to start up when it is powered on is b) ROM
Further Explanation:
RAM and ROM are the types of memory. RAM is the active memory. The data can be read and written from RAM. While ROM is read only which meas that data or instructions on ROM cannot be changed.
The files or instructions that are needed to start up a computer are usually unchangeable as they always have to be the same. These type of instructions are stored in ROM. When he computer is turned on, the instructions needed to start the computer are loaded into the main memory from the ROM.
Hence, ROM is the correct answer.
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<span>The Alt key on a PC is utilised to change the capacity of other squeezed keys. It will go to any desired short cut in the computer that is being accessed. in short , one can use this to reach other functionality of a windows based computer easily. For example, if you were accessing documents and you want to skip to a different function from what you were doing on the desktop.</span>