Which of the Following Have an Impact on Long-Term Variable $\text {\underline{ Product variety} }$

Multiple Choice

Which of the following have an impact on long-term variable costs?
$\text {\underline{ Product variety} }$     $\text {\underline{ Prochuct complexity} }$     $\text {\underline{ Process complexity} }$

A) no no no
B) no yes yes
C) yes no yes
D) yes yes yes