Read the text and review the chart.

the standard plank test is an easy way to measure the strength and endurance of your core muscles. you can perform the test at home. all you need is a stopwatch and a partner.

to perform the standard plank test:

•move into the plank position, positioning feet and hands on the floor as if doing a push-up.
•hold this "up” position as long as possible, being careful to keep your back straight and flat.
•have a partner time how long you can hold the pose. the timer should be stopped when your hips begin to sag or rise.

how does the performance chart included in this document clarify the standard plank test procedure?

it illustrates the main purpose of the test for test takers.
it provides test takers with tips for improving endurance.
it shows test takers how test results should be recorded.
it test takers interpret and evaluate their test results.

It helps test takers interpret and evaluate their test results.

and your question what topic are you in trouble with?

a complex sentence consists of an independent clause and one or more dependent clauses.  

to write complex sentences, we must use subordinating conjunctions.  

all the complex sentences begin with a subordinating conjunction and when it occurs, a comma must be place at the end of the dependent clause. on the contrary, if the sentence begins with an independent clause, then no comma is used.

after  

although  

as  

because  

before  

if  

since  

when  

for example,  

after she won the competition, she became very popular.  

although my father was hurt, he continued fighting for his rights.  

as all of you got a ten, you will be able to leave early today.  

before he went to the war, he asked his parents to bless him.  

if it is cold, i won’t go out.  

since you didn’t bring the homework, you will get low grades.  

when it is hot in the town, everyone goes to the beach.