Islamic portable arts
a. were first carried by islamic deity.
b. were sold throughout europe and africa during the 14th century.
c. were highly sought items of luxury.
d. must include both calligraphy and arabesques to be valuable.

I believe the answer is: c. were highly sought items of luxury.

In the past, many European nobles and merchants were willing to pay a high price to obtain original islamic portable arts.

There are two main reasons for this:

- At that time, travel across the continents were extremely hard and expensive, which increase the value of imported product such as these arts

- The arts use expensive material such as Silk and wools.

i dont know but thats a great qusestion