Problem:
Read the following paragraph and determine if the hypothesis is true:

Rudbeckia hirta, commonly called black-eyed-Susan, is a North American flowering plant in the sunflower family, native to Eastern and Central North America and naturalized in the Western part of the continent as well as in China. It has now been found in all 10 Canadian Provinces and all 48 of the states in the contiguous United States.

OPTIONS:
- Yes
- It's impossible to say
- No
Hypothesis: Rudbeckia hirta is a very popular plant with the elderly
****
Answer:
It's impossible to say

Problem:
Read the following paragraph and determine if the hypothesis is true:

Hakea gibbosa, commonly known as hairy hakea or rock hakea, is a shrub of the family Proteaceae native to southeastern Australia. It has become an environmental weed in South Africa and New Zealand, where it had been introduced for use as a hedge plant.

OPTIONS:
- Yes
- It's impossible to say
- No
Hypothesis: Hakea gibbosa has already spread from Australia to Africa, and there are fears that it will now spread onto other continents.
****
Answer:
It's impossible to say

Problem:
Read the following paragraph and determine if the hypothesis is true:

Sierpe River (Spanish: "Rio Sierpe") is a river of Costa Rica. Boat traffic is common with both locals and tourists. A broad range of wildlife can be seen from the American Crocodile, various other reptile species, and exotic fish and birds. It joins the Rio Terraba.

OPTIONS:
- Yes
- It's impossible to say
- No
Hypothesis: The Sierpe River is an excellent place for tourists to visit.
****
Answer:
It's impossible to say