Guess the required analysis required for 11 descriptive terms

For 10 of 11 terms in the table below, write the alphabetic character that best matches the correct name. Each alphabetic character can be used more than once. You select 10 items to answer. If answer all 11, only first 10 to be graded. Only 1 best answer key value per Descriptive term.
KEY
DESCRIPTIVE TERM
Discovering customer prior purchasing patterns
Reviewing Delivery trucks’ maintenance records
Determining optimal dates for aircraft engine maintenance
Analyzing real-time feed of stock market data
Forecasting customer purchases on credit defaults
Planning for best number of employees in a company
Reviewing 1 year history of local delivery performance data
Estimation of clients’ upselling purchases during next 6 mos
Reviewing competitors’ domestic sales data
Discovering social media opinion leaders for our brand
Calculating the average number of days that customer pay their invoices
KEY
NAME
A
Predictive analysis
B
Diagnostic analysis
C
Prescriptive analysis
D
Descriptive analysis
Also, For any 1 of your 10 selections above, briefly state WHY
you chose the type of analytics: