{{B}}pAssAgE Four{{/B}}

whAt is thE spEAkEr’s mAin topiCA．EFFECts oF using moBilE phonEs on hEAlthy humAn CElls.
B．risks oF DEvEloping CAnCEr involvED in thE usE oF moBilE phonEs.
C．DAmAgE to hEAlthy CElls CAusED By thE usE oF moBilE phonEs.
D．thE potEntiAl hEAlth hAzArDs oF moBilE phonEs on humAns.