3x + 5 is common factor.
The answer is option A.
A common factor is an entire wide variety which is a thing of or greater numbers. The highest common factor (HCF) is the finest issue to be able to divide into greater numbers. The lowest common multiple (LCM) is the smallest multiple that is common to 2 or greater numbers.
Common factors of two or more numbers are a number that divides each of the given numbers exactly. The common factors above are shown below.
Learn more about common factors here: https://brainly.com/question/219464
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