Text-based stimulus: A single 2x2 grid of four labeled flowchart panels for question 70. Title at top: Flowchart options. Panel A shows: Send and check the code before checking the password. Panel B shows: Password decision first; only its Yes branch sends and checks the code; any failed check denies access. Panel C shows: Grant access after either passwordCorrect or codeCorrect is true. Panel D shows: Deny access before either input is collected. Keep panel labels A, B, C, and D in the upper-left corner of each panel and keep all visible text exactly as written. A two-factor sign-in flowchart inputs password, checks passwordCorrect, sends a code only if the password is correct, then checks codeCorrect. Which design preserves the intended security sequence?