Task: Question Answering
Input (English): Problem: in cliff ’ s impressive rock collection , there are half as many igneous rocks as sedimentary rocks . of the igneous rocks , 1 / 3 are shiny and the rest are matte , while 1 / 5 of the sedimentary rocks are shiny . if there are 30 shiny igneous rocks , how many total rocks does cliff have ? 
Options: a ) 30 , b ) 45 , c ) 270 , d ) 90 , e ) 135
Output (English): c