Was Descending Staircase serious, a spoof or both? What did Duchamp bring to Cubism that had not previously been seen

Which statement about landscapes by thomas cole, vincent van gogh, shen zhou,and ansel adams are true? choose all answers that are correct.

Which sentence contains a comma splice? marco rode to school on his bicycle this morning, he arrived an hour early.marco, who enjoys riding his bicycle to school, arrived just before the bell today.marco rode to school on his bicycle on monday, tuesday, and wednesday.marco, who rode to school on his bicycle this morning, arrived an hour early.mark this and returnsave and exit

What is the most best and most complete definition for graphic design