In the Section "Investigating Life: Discovering the 'Fishapod'",Tiktaalik Either Crawled

In the section "Investigating Life: Discovering the 'Fishapod'",Tiktaalik either crawled or paddled in shallow tropical streams about 380 mya,during the late Devonian period.These shallow waters often became anaerobic.What selective advantage did Tiktaalik have under these conditions?

A) It could lift its head out of the water and breathe air through its gills.
B) It could crawl out of the water and walk over to new shallow streams.
C) It could swim better than fish.
D) It could crawl on shore and feed on birds and reptiles that were on lanD.
E) It could lift its head out of the water and breathe air through its lungs.