Amazon arguably represents the greatest competitive threat to FreshDirect because the $\_\_\_\_$ of both firms involves $\_\_\_\_.$

a$.$

Core competency, distribution

b$.$

Core competency, grocery retailing

c$.$

Product$-$market fit, urban consumers

d$.$

IT infrastructure, RFID tags

e$.$

IT infrastructure, barcode scanning

f$.$

Product$-$market fit, inbound logistics