Which statement describes how beta decay occurs? O A
A neutron changes into a proton and a high speed electron is emitted from the nucleus.
B
An electromagnetic wave is emitted from the nucleus.
С
A helium nucleus is emitted from the nucleus.
D
A proton changes into a neutron and a high speed electron is emitted from the nucleus.

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answer; /// i believe that the correct answer is ( monophasic ); ethinyl estradiol- ethynodiol diacetate is a monophasic oral contraceptive agent; ///

i think a) betsy can donate only blood to mark is correct because, mark and betsy have the same blood type. whereas nobody else has b+ blood so betsy can't donate to them.