Of the following $4$ portfolios, choose the one that is most diversified.

$\backslash$table$[[$A$,$B$,$C$,$D$],[$Amazon$,$Comcast,Comcast,Amazon$],[$Starbucks$,$Toyota,Apple,Pfizer $($pharmaceuticals$)],[$Toyota$,$Exxon Mobil,Sony,Disney$],[$Pfizer $($pharmaceuticals$),$Pfizer $($pharmaceuticals$),$Pfizer $($pharmaceuticals$),]]$

A

B

C

D