aura needs some reading glasses. Without them she must hold a book $50$ cm from

her eye in order to read the text clearly. What power lenses does she need in her reading

glasses in order to read a book at a comfortable distance of $25$ cm from the eye? $($assume

the lenses will be $2$ cm from her eye$)$

$($A$)2\mathrm{.}9$ D

$($B$)1\mathrm{.}9$ D

$($C$)+1\mathrm{.}9$ D

$($D$)+1\mathrm{.}5$ D

$($E$)+2\mathrm{.}3$ D