PLEASE HELP ASAP I WILL GIVE THE BRAINLIEST IF YOU ANSWER BOTH BUT ONE IS FINE [The document for the questions]
. . . The circumference of the city of Constantinople is eighteen miles; one-half of the city being bounded by the continent, the other by the sea, two arms of which meet here; the one a branch or outlet of the Russian [Black Sea], the other of the Spanish sea [Mediterranean Sea]. Great stir and bustle prevails [dominates] at Constantinople in consequence of the conflux [meeting] of many merchants, who resort thither [come there], both by land and by sea, from all parts of the world for purposes of trade, including merchants from Babylon and from Mesopotamia, from Media and Persia, from Egypt and Palestine, as well as from Russia, Hungary, Patzinakia, Budia, Lombardy and Spain. In this respect the city is equalled only by Bagdad, the metropolis of the Mahometans [Muslims]. . .
— Rabbi Benjamin of Tudela, Manuel Komroff, ed., Contemporaries of Marco Polo, Boni & Liveright from the NYS Global History and Geography Regents Exam.

1 - According to Benjamin of Tudela’s account, why did “Great stir and bustle” prevail [dominate] in Constantinople?

2 -Explain the extent to which Benjamin of Tudela’s account is a reliable source of evidence about Constantinople in the 1100s.