Which sentence is punctuated correctly? (5 points)

In first-period biology class we learned that, the ecosystem, is a fragile and sensitive thing.
The freshmen, were excited to hear about extra-credit opportunities in their algebra class.
Getting her license proved to be more difficult and tricky, than she thought it would be.
In order to serve students best, school districts need to ask for additional funding.

Question

Which sentence is punctuated correctly? (5 points)
 
  
 In first-period biology class we learned that, the ecosystem, is a fragile and sensitive thing. 
 The freshmen, were excited to hear about extra-credit opportunities in their algebra class. 
 Getting her license proved to be more difficult and tricky, than she thought it would be. 
 In order to serve students best, school districts need to ask for additional funding.

bishoppatton · Answer

The last one

anonymous · Answer

thank you

zaraxx · Answer

also this is math btw, i just don't want ppl to bite ur head off

anonymous · Answer

I noticed that right after I posted thank you though