Which techniques are used by designers of application forms to call attention to important information?

i. graphic features such as boxes and shading

ii. typographical features like font size or boldface

iii. headers, numbers, and/or bullets

i only
ii only
i and ii
i, ii, and iii

The caves at lascaux were closed in 1963 because a. vandals were destroying the paintings b. the collective breath of the many visitors caused the paintings to corrode c. the weather was destroying the paintings d. the government of france wanted scholars to be able to study the work without distraction

(i think my answer is a, am i correct? ) a pentagonal traffic sign is a sign. a. school crossing b. parking c. wrong way d. yield

Based on the sentence, what does a studious effort require