The simplest is for one or more of the members to simply donate one million dollars to the IGGS Scholarship Fund.
( ( The simplest ) ( ( ( is ( for ( ( ( one or ) more ) ( of ( the members ) ) ) ) ) ( to ( simply ( ( donate ( ( one million ) dollars ) ) ( to ( the ( IGGS ( Scholarship Fund ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (JJS simplest)) (VP (VBZ is) (PP (IN for) (NP (NP (QP (CD one) (CC or) (JJR more))) (PP (IN of) (NP (DT the) (NNS members))))) (S (VP (TO to) (VP (ADVP (RB simply)) (VB donate) (NP (QP (CD one) (CD million)) (NNS dollars)) (PP (TO to) (NP (DT the) (NNP IGGS) (NNP Scholarship) (NNP Fund))))))) (. .)))
The simplest is to donate one million dollars to the IGGS scholarship fund, but one can also donate to another charity. 
( ( ( ( ( ( The simplest ) ( is ( to ( ( donate ( ( one million ) dollars ) ) ( to ( the ( IGGS ( scholarship fund ) ) ) ) ) ) ) ) , ) but ) ( one ( ( can also ) ( donate ( to ( another charity ) ) ) ) ) ) . )
(ROOT (S (S (NP (DT The) (JJS simplest)) (VP (VBZ is) (S (VP (TO to) (VP (VB donate) (NP (QP (CD one) (CD million)) (NNS dollars)) (PP (TO to) (NP (DT the) (NNP IGGS) (NN scholarship) (NN fund)))))))) (, ,) (CC but) (S (NP (PRP one)) (VP (MD can) (ADVP (RB also)) (VP (VB donate) (PP (TO to) (NP (DT another) (NN charity)))))) (. .)))