In the capitalization process, Columbus is viewed as $\_\_\_\_\_\_\_\_\_$ by virtue of the fact that he$\_\_\_\_\_\_\_\_$

a$.$ partner; receives $10\%$ in venture shares

b$.$ shareholder; is to receive future shares

c$.$ project manager; is to receive a $10\%$ bonus on all future revenue

d$.$ shareholder and partner; receives shares and a salary

e$.$ employee; is to receive a salary derived from future revenue