(I'LL BE GIVING BRAINLIEST TO WHO EVER HELPS ME!! Which expression results in a sum or difference of three and four forty eighths?

A) two and two twenty fourths plus one and one half
B) one and three twelves plus two and one quarter
C) seven and nine sixteenths minus four and one third
D) six and two sixths minus three and two eighths

(Here is an image if needed) :

Step-by-step explanation:

D) six and two sixths minus three and two eighths

introduction, methodology, results, discussion

step-by-step explanation:

an observational study is one which consists of actual observation to record data and then analyse the data.

there are a number of factors that should be analyzed before starting an observational study.

the main four factors are:

i) introduction:   this should be analysed to check whether the purpose of the study is correctly established and the data recorded are appropriate for the study

methodology:   the method of collecting the data, such as whether randomly selected, and whether sample size matches with the population to be studied, whether questions asked are easy to answer by common men, etc.

results: then results such as summary of data with comments should be studied thoroughly

discussion:   the last is the discussion, this can be either by management people or persons who are all interested , etc.

he has now walked a total of what?

if i know what this is maybe i can

step-by-step explanation: