Spider Invasion

How many known spider species are there in the world today? Is it:

a) 2000

b) 20,000

c) 40,000

I have chosen this topic because I'm afraid of spiders...I don't have a phobia but I do not like...

This interview cost me ... because for me was enough terms that he did not understand .. but I've had a lot of reading and watching complication using the dictionary.

There are many words that have surprised me how to pronounce some words ... I gave them another pronunciation and I have heard that although mispronouncing continue ... as arachnophobia, scary, among other ...