A Simply Supported Steel Beam of Length L = 1 $( h = 75 \mathrm {~mm} , b = 20 \mathrm {~mm} )$

A simply supported steel beam of length L = 1.5 m and rectangular cross section ( $( h = 75 \mathrm {~mm} , b = 20 \mathrm {~mm} )$ carries a uniform load of $q = 48 \mathrm { kN } / \mathrm { m } \text { that includes its own weight. }$ 48 kN/m that includes its own weight. The maximum transverse shear stress on the cross section at 0.25 m from the left support is approximately:

A) $20 \mathrm { MPa }$
B) $24 \mathrm { MPa }$
C) $30 \mathrm { MPa }$
D) $36 \mathrm { MPa }$