Explain What the Following Data Say About the Genetic and Environmental

Explain what the following data say about the genetic and environmental influence on each characteristic. How did you interpret these data? (MZ = monozygotic twins and DZ = dizygotic twins.) $$\begin{array} { | l | c c } \hline & { \text { Concordance in } } \\\hline \text { Trait } & \text { MZ } & \text { DZ } \\\hline \text { Right- or left-handedness } & 80 & 75 \\\hline \text { Manic depression } & 80 & 20 \\\hline\end{array}$$

A) Handedness and manic depression both have a strong genetic basis and little or no environmental basis.
B) Handedness and manic depression are both strongly affected by environmental factors with little or no genetic basis.
C) Handedness and manic depression are strongly affected by both environmental factors and genetic factors.
D) Handedness is strongly affected by environmental factors with little or no genetic basis, while manic depression is significantly affected by genetic factors.
E) Handedness is significantly affected by both environmental and genetic factors, while manic depression is significantly affected by environmental factors with little genetic basis.