A Vertical FDI Refers to a Type of FDI in Which

A vertical FDI refers to a type of FDI in which _____.

A)  a firm duplicates its home country-based activities at the same value chain stage in a host country 
B)  a firm invests in a portfolio of foreign securities but without active management of those foreign assets 
C)  a firm moves upstream or downstream at different value chain stages in a host country 
D)  a firm produces the same products or services in a host nation as it does at home