Which phrase correctly completes this sentence?

the result of building the panama canal was that people who wanted to get from the caribbean sea to the pacific ocean

a.
had to sail around south america

b.
would need to make a dangerous trip by land

c.
would have to sail only 40 miles

d.
had to ask permission from colombia

To develop a molecular clock, you need to find which of the following?

a sequence of molecules

the rate at which changes occur in a type of molecule

how much total change has occurred in a type of molecule from two different species

how many molecules a species has

Explanation:

To develop a molecular clock, you need to find which of the following?

a sequence of molecules

the rate at which changes occur in a type of molecule

how much total change has occurred in a type of molecule from two different species

how many molecules a species has

the answer would be c. sediment buildup on continental slope

                                                                                -hope this -

this is not a question