are run together without a coördinate conjunction.
Rewrite the following so that it will be correct, concise, and clear:
The Europeans were anxious for trade with the East,
for they were dependent upon them for spices and
luxuries. The three routes were through the
Mediterranean Sea, over the Suez Peninsula, down the
Red Sea, and across to India. Another was through the
Mediterranean and then through Arabia. The other was
from the Mediterranean and then through the Black Sea
and then by land to India. It became necessary to seek
a new route because the Turks held Constantinople, and
all vessels had to pass through the Mediterranean, and
the Turks held this by pirates. The first explorers
were working under the leadership of the King of
Portugal, and they solved the problem by going around
Africa and then to the Indies, but this was too long,
and so explorers tried other ways, and the result was
the discovery of America.