Question 304943
Let c = carbon
Let h = hydrogen


The ratio of carbon to hydrogen is given by the fraction c/h.


Let r = c/h


r = the ratio of carbon to hydrogen.


If the ratio has to be greater than 1, then r > 1


If the ratio has to be no more than 3, then the ratio has to be less than or equal to 3 which becomes r <= 3


You have:


r > 1
r <= 3


Your answer should be:


r > 1 and r <= 3


or your answer should be:


1 < r <= 3


Since r = c/h, then  your answers would correspond to:


c/h > 1 and c/h <= 3


or:


1 < c/h <= 3


I do not see that in any of your selections.


Check your selections again to see if any of them conform to either of these 2 answers.