If you want good sources go to wikipedia and look at the sources used in the wikipedia article. DO NOT USE THE WIKIPEDIA ARTICLE ITSELF AS A SOURCE!
Index funds<span> are a type of </span>mutual fund<span>. </span>Mutual funds<span> may be actively or passively</span>managed<span>. an actively </span>managed mutual fund<span> attempts to apply discretion to choose a basket of stocks that collectively outperform the market or their relevant benchmark. ... Most ETFs are exchange traded versions of </span>index funds<span>.</span>
It eliminated the defense of diminished capacity
At least, from what you said I'm assuming that's what you wanted, if not, just say so and elaborate why and I'll try to find another solution
He is best known for d<span>iscovering North America</span>