Hildegard's compositions are most well known for their

Hildergard’s most significant works were her three volumes of visionary theology: Scivias, Liber Vitae Meritorum and and Liber Divinorum Operum.

Explanation.

i think a and b is the answer

"prior to 1910, these new artists were called neo-impressionists, and they believed that "modern paris" was the proper subject for their paintings."

this is the text provided by the program, disregard other answers, as they are confusing and based on loose knowledge of the subject.   : )