A 60-year-old man has a near point of \(100 \mathrm{~cm}\), making it B10 impossible to read. What refractive power reading glasses would he need to focus on a newspaper held at a comfortable distance of \(40 \mathrm{~cm}\) ?

A. \(-2.5 \mathrm{D}\)

B. \(-1.5 \mathrm{D}\)

C. \(+1.5 \mathrm{D}\)

D. \(+2.5 \mathrm{D}\)