A R$=0\mathrm{.}70$ m radius cylindrical region contains a uniform electric field E that is parallel to the axis

and is increasing at the rate $5\mathrm{.}01012($V $/$ m$)/$ s$.$ The magnetic field at a point r $=0\mathrm{.}25$ m from

the axis has a magnitude of:

A$.0$

B$.5\mathrm{.}5106$ T

C$.1\mathrm{.}1105$ T

D$.7\mathrm{.}0106$ T

E$.3\mathrm{.}5106$ T