Paul Ecke, flower grower and hybridizer, A. became B. known as “Mr. Poinsettia” after developing new varieties of the flower and C. by pioneering it D. as a living symbol of Christmas. E. No Error

Can you please go over this question? From Practice SAT 2005, Section 5, Question #27: “Paul ecke, flower grower and hybridizer, A. became B. known as “Mr. Poinsettia” after developing new varieties of the flower and C. by pioneering it D. as a living symbol of Christmas. E. No Error

I chose C (by pioneering) because I thought the “by” was a bit unnecessary to use (and I guess, unparallel as well).

What would you recommend to a student that consistently hits 700+ on Math yet…

What would you recommend to a student that consistently hits 700+ on Math yet rarely gets 800 due to a silly mistake or a random gap in the knowledge (about the content of the question itself/ the approach towards it)? Additionally, is your math book geared for everyone or just students who need to relearn all of the math content (as opposed to already high scoring mathematical students who usually miss 0-3 questions)?