After the tent stakes are arranged in a row, like ones in fig. 289, adjust the forks of the uprights two inches from the ends of the ridge pole (fig. 288), then make fast the two extreme guy ropes a and b to tent pegs; the others are unimportant for the present, after that, raise one tent pole part the way up (fig. a)the text structure is compare and contrast; words like unimportant and ridge poles indicate this. b)the text structure is sequence; words like after and then indicate this. c)the text structure is chronological; words like end and present indicate this. d)the text structure is cause and effect; words like after and present indicate this.   

B. The text structure is sequence; words like after and then indicate this.

Explanation:

The text structure in the given passage follows an organizational mode that follows a sequence that suggests the actions one after another. The use of words 'after and then' compliments the order of the arrangements to reach a final product(tent here). The authors use the sequential text structure to provide a more coordinated and formulated structure to the content. The given sentences exemplify a procedure that is to be done in sequence, thus, the author has employed the sequential structure.

d. cassius cannot believe that a weakling like caesar has become so great.

c. a group of tribes that formed a confederacy