The numerical value for a correlation

can never be greater than $1\mathrm{.}00$

can never be less than $-1\mathrm{.}00$

can never be greater than $1\mathrm{.}00$ and can never be less than $-1\mathrm{.}00$

can be greater than $1\mathrm{.}00$ and can be less than $-1\mathrm{.}00$