In addition to regular Sudafed, Sudafed also makes products for the following: head congestion and pain relief, sinus congestion $($day and night$),$ sinus pressure and pain, sinus $12-$hour pressure and pain, head congestion and flu severe, head congestion and mucus, sinus congestion $24-$hour, nasal congestion flavored liquid for children, and cough and cold flavored liquid for kids. The manufacturer of Sudafed is using a$($n$)\_\_\_\_\_\_\_\_$ to reach as many different target markets as possible.

Group of answer choices

Full line strategy

Downward line stretch

Cannibalization strategy

Undifferentiated strategy

Upward line stretch