Answer: A. universal
Explanation: correct on Plato
Answer:
Both B and C are correct.
Explanation:
In any case, you want the OR (age ≥ 18) in there, because that makes the expression true for people 18 and up. So that already disqualifies answer D.
The most precise answer is B, since it literally states the requirements.
A is incorrect, because learners can be 1 as well, and the age can be 18 as well, so you need ≥ in stead of >.
C is interestingly also correct. The left hand side of the OR would be true for ages over 16 or 17, but that's OK in this case.
The only correction I see is you need to add curly braces to enclose the second and third lines.
Look up binary code dictionary it will help you learn codes in letter of binary