Frequent food questionnaires $($FFQ$)$ are a simple way to obtain information on the foods individuals consume by asking them questions about typical amounts of food consumed in a day, a week, or a month. A more accurate picture is obtained by obtaining a detailed food diary $($DR$)$ for several days that are randomly chosen over a certain time period. The data obtained from a frequent food questionnaire can be compared with the food diary to assess the validity of the questionnaire. The correlation$(r)$ between alcohol consumption from the food questionnaire and diary is equal to based on the seven individuals:

DR FFQ

$8\mathrm{.}26,1\mathrm{.}68$

$0\mathrm{.}83,0$

$20\mathrm{.}13,15\mathrm{.}10$

$11\mathrm{.}16,7\mathrm{.}49$

$\backslash$table$[[7\mathrm{.}18,12\mathrm{.}84]]$

$1\mathrm{.}760$

$22\mathrm{.}66,25\mathrm{.}06$

a$.0\mathrm{.}79$

b$.0\mathrm{.}89$

c$.$ Since the relationship between the two variables is non$-$linear, $r$ should be close to $1$

d$.$ All of the answer options are correct.

e$.$ None of the above