<span>A document that promises to pay specified sums of money on specified dates and is a debt to the issuer is called a bond</span>
The answer is (a.) DOS
DOS stands for Disk Operating System. MS-DOS is the operating system which has a command interface similar to the command prompt of Windows 7 and Windows 8. Among the options, DOS is the only OS which is has a command line interface. Others have graphics.
Answer:
repeats an instruction while the Zero flag is set
Explanation:
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There are two standard colors for a text in a them