Consider the project scheduling information given in the table below. The project duration is 42 days. Which activity (or activities) should be crashed to achieve the minimum cost for reducing the project duration by 1 day. (select all that apply) Activity Predecessor Normal time Normal cost crash time crash cost A B 200 4 350 B 8 220 220 C B 6 250 650 A 9 500 5 600 E A,C 10 150 9 500 F E 10 500 9 650 G D.F 8 400 6 900 O B OE OF OC OD O A OG